剪刀石头布游戏

  1 #include                                                          
  2 #include
  3 #include
  4 int main(void)
  5 {
  6     char gesture[3][10]={"scissor","stone","cloth"};
  7     int man,computer,result,ret;
 8
  9     srand(time(NULL));
 10     while(1){
 11         computer=rand()%3;
 12         printf("\ninput your gesture (0_scissor 1-stone 2-cloth):\n");
 13         ret=scanf("%d",&man);
 14         if(ret!=1||man<0||man>2){
 15             printf("invalid input!\n");
 16             return 1;
 17         }
 18         printf("your gesture:%s\tcomputer's gesture:%s\n",gesture[man],         gesture[computer]);
 19         result=(man-computer+4)%3-1;
 20         if(result>0)
 21                 printf("you win!\n");
 22         else if(result==0)
 23                 printf("draw!\n");
 24         else
 25                 printf("you lose!\n");
 26     }
 27     return 0;
 28 }
result=(man-computer+4)%3-1;用来比较大小的，而且还能循环。。。。。此程序的关键所在